Truck.



w. F. IRRGANG. Y

TRUCK. APPLICATION FILED JUNI-:1811912- Mmgm, Patented Jan.1i,1916.

2 SHEETS-SHEET I.

ATTORNEY.

[NI/ENTOR,

W. F. IRRGANG; TRUCK. APPLICAHON FILED JUNE 18,-1912.

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2 SHEETS-SHEET 2.

INVENTOR WITNESSES.-A

Patented m1111916.

LMyyU/Qm Specification .ilppliea'tlon filed June lil, will,

To JZ/1,071,077@ it may conf/'67%.'

Be it known thatl, l'lfiLLifniii l?. nneiiiie; a citizen oi the United States of Aein]ei'iea, residing at llindsoi Locks, in the county oli' Hartford and Stale of Conneeieu have in- 1"eniued new and useful linpioveinents in Trucks, of which the iolloWiif-igg1 is a speeifcation. o

This` invention relates' to im elevating truck of' a forni usedkin .trucking loads, which 'loadsv are convenientlyl handled by means of movable platform Supported hy he tifuel; which platform is opeiaiecl ineehanisn'i contained in the tiuel lo vaise oi' lowei the saine. y

The invenion especially relates lzo iin* 'proveniente in' platform handiueks piro- 'viilecl with an elevated platioi'ni of z4 i'oiin used in transpoi'ting inecliinn Weight loads, which loads are more eonifementljy handled by being1 'stacked or piled onrslncls, stands oi' iahles. The truck is pushed umlei` these eliicls, stands or eahles with platform in lowdown position, then the platfoi'm is elevaied n'ilhthe loail thereonloy means of nieclia-l niem.' contained in bhe trunk to raise lower the saine. v e y i llhe object of `this invention isvioinovicle al truck of the classe i'eiei'i'ecl to which ie nar'- -tienlarly designed to move medium Weight loads 'from f one nointbov anothei 'at ininiN i'nfinn expenseiof labor. and, niininnnn eifaipineim'ihy lnoihling' a ti'ncl; with plaie loi-'m x'vhieh can he raised .or loweiieel Quickly hy improved operating;1 mechanism,

@theFohjeete ofthe invention will appeal:

in: the detailed y(,leseiiption anal annexed, laimf. "I

lll/ith these objeete in View 'lah-e invention generally (bomwises a truck frame anni a "platn form whiehfis raised and lowered with rela-W tion tothe 'tinekframe by inea'ns of a can?, oi? cams"inoui'xl'eil on oneo'f Slaiil elements anni engaginglhe other within iollingiiCtiOn Contact'. li ispieiieirieclv to Jurn the eaine hv 'means o'l" liezn" segmens' attachecl, thereto a'nrl `havingr the' eaino'eentei' with the pitch line oi. the ,g'e'ai' teetheoii'esponelii y to the faln siiil"aee. Mechanism is in agiol-hion piovided which ieoperahle by the movement of the handle to Acause the cam or Caine to tnin `the ealn en.

i lv

non 1 lzine iiangg'einen'b ol parla; will oe loelienl inlio i5 nef'inion n looleil fheieififein in a, eoiisenienl; mein.. -i

il/ith the general oneiaiion a.. (leef the invention le epeeilieally ehown aniY seiihecl in nonneation "with the aeeon ing; drawings as an illustration of on 'ei'reei forni of he iiijvenlion.

ln 4the Lh'awings:- gine l is .eide ele- Vation o1 the li'ncl; and lie nleenanis ei'aletl. 5. 1e a le` ileel 'show lili part oil @he ineelniniein loil elevati pla'lfiom in a position Whieh than the mecha. ni .talee when 4the ln been elevael together with ille loo.. "o rangement of the parle wheiehi Lhe lo form. ie locked in' iisaaisefl poeition. I 3 is ifienl; Lview of the lei/enineehaniem velved in the elevating and loeli n nien?. wilvhhe parle in the i'elative n if shoivnin: nig A Y lilei'ei'iing'lo anni l a' is Shown comprising tlie i-zieh; i' two Wheels al: the

lalaslnipel l'haine 'lo llinil; 4. niovoinent oli said, lai-shall il pose to he oleseiiheel. i'it'the othei ein, el:` ,e n, a luf o pioi/itleiil. Wil;

foi' engagement by' l 'pointe o on" ala, each. of. the :lfoui' coi-nere he of 'L ifi-aine. lli goal' ee inenlacis aeherl p nani Z anni. lzlne afwnienn'has no L"pecl v iiehlino nl; eorieeponil on vthe elevating plaloiin., melia y ai Ilm) iziehefl as; shown. ,Mongg'eido of each nach' 9',

ie a heiieontal surface-e eoiieaponiling izo the pitch line of the rack g to coperate with cam d. Alongside of each horizontal surface c, is a sloping surface f, which corresponds to the movement of the platform a when being elevated. As the teeth of the gear segments c are in mesh with the racks located on the elevating platform a., it is seen that if the platform (L is pulled forward toward the front end of the truck, the racks g will turn the gear segments c, to cause the cams d to have a 'rolling engagement with the horizontal surfaces e, and as the cams l continue to revolve, due to said forward movement ofthe platform a, the cams d will raise the platform a and the only friction between-the gear segments and the racks, as well as between the cams Z and the horizontal surfaces e, will be a rolling friction and not a sliding friction. The sloping surface f has nothing to do with elevating the platform a., but is provided so that the plat-l form a cannot become separated from frame L, or gear c become separated from rack g ,1,

this being accomplished by the top surface of slope 7' sliding along under stops z' and j; this top surface of slope f always being the same distance from underside of stops 2' and j, owing to its shape, no matter what position the elevation platform a may be in. In this rolling friction it will be seen that the platform a 'can be raised with much less power than Where the friction is sliding.

To move the platform forward in order to operate the cams as described there is a connection by link members m pivoted at points l at the forward part of the platform a and also pivoted on the U-shaped frame n between the upper end thereof and its pivoted points p. IfV the handle s with the parts in position as shown in Fig. 1 is swung downwardly or clockwise it is seen that the handle will bear against the upper cross piece of the U-shaped frame a (see Fig. 3) and turn the latter on its pivot points 17, which action causes the link members m to be drawn to the right (Fig. 1) and pull the platform a forwardly. If this downward movement on the handle is continued the point at which the link members m are pivoted to the U- shaped frame a will be carried by the dead -center passing through points 77 and Z so that the weight of the platform a. with any load which may be thereon will then act to pull the U-shaped Vframe 'n in a clock-wise direction without further movement of the handle a. 'The movement of thel frame n however is limited b v the lags r/ which are fixed to the trnk 'frame and engaged by the lug extensions 1* on the'frame n below the points 7), shortly after the point at which the members m are pivoted to the frame fn, passes by the dead center referred to. The platform-1 a is thus locked into the elevated position due to its own weight and the arrangement of the locking parts. 'lhe handle s can then be swung on its point .e freely and the truck can be drawn to any point desired in the same manner that any ordinary truck is operated. When it is desired to lower the platform a the handle s is lowered so that the lug extension o is placed in position for the rod u to engage the hole therei-n. This rod is then pressed against its spring so that it enters the hole in lug 0 and in this condition the handle s is pulled up so that the U-shaped frame n as shown in Fig. 2 is carried to the upper side of the dead center between points Z and p after which the Weight of the platform a together with the weight of any load thereon will act to swing the U-shaped member n in a counter clock-wise direction 'and the platform a will ride down with rolling friction between :the cam faces to its lowermost position shown in Fig. 1 on the ca ms al. This invention 1s not, however, limited to any special size, and can be built with three or four wheels. y y While the preferred specific form of the invention has been described in detail it is clear that the details of the invention can with the racks and?, atfii of the cam faces.

bears on its respectivebearing surface.

` 2.. In,combination, truck frame, cams rotatably mounted th leoni, a gear segment with the pitch line corresponding to the cam attached to each camito turn therewith, a truck platform having racks attached thereto', and a bearin surface for each cam ahd gear on the frai e; all constructed and arianged so that the gears mesh with the racks and each ofthe cam faces bears on its respective bearing surface, a handle for the truck, 'and means operable by the handle for shifting the platform and frame one relatively to the other, whereby said cams, racks, and gearsmay lift and lower the platform on the frame.

3. In combination, a truck frame provided w'ith a steeringwheel and pivoted handle trefor, ailit'ting platform mounted on tl e the horizontal movement of the platform to lift and 'lower the latter, and mechanism to move the platform horizontally comprising a U-shaped frame pivoted' to the truck adjacent the handle having a lmember extendin'f across and in front of the handhl and truck frame, means operable by iop a rearwardly extending member to overlap said mechanism as the handle is swung up the1 handl, irl ln ipvoted to he platorm or down on its pvot.

an said -s ape erame at a stance rom the pivot 0f the latter, and means on the WILLIAM F' IRRGANG' handle to engage said overlapping member, Witnesses: all constructedand arranged so that the -GEORGE H. DOUNTON, handle`may` engage and fully control the NELSON L. JARVIS. 

